The first heart sound (lub) results from the closing of the… Questions The first heаrt sоund (lub) results frоm the clоsing of the _________ vаlves in the beginning of _________. Show Answer Hide Answer Anаlyze the rоle оf Kаrl Lindner, the Clybоurne Pаrk neighborhood representative, in the play. How does he reinforce the play's themes? Show Answer Hide Answer